Jaeger-LeCoultre Master Ultra Thin Perpetual Watch Review

The watch has three counters dedicated to the perpetual calendar display: the day of the week at 9 o'clock; the date at 3 o'clock; and the month at 6 o'clock. A four-digit date aperture is placed at 7 o'clock, and a moon phase display is at 12 o'clock.

All indications are controlled by a single corrector on the side of the case at 8 o'clock. One press moves the perpetual calendar one day forward, with all additional changes taking place automatically. The timepiece takes account of unequal lengths of months, and will automatically display the 29th February every four years. The moon phase will also retain an accurate display for the next 122 years.

The Jaeger-LeCoultre Master Ultra Thin Perpetual has a 18kt white or pink gold case with a diameter of 39 mm. It has double sapphire crystals, and is powered by the Swiss automatic in-house calibre 868 movement with a 22kt gold rotor. The white gold model has a silver tone dial with black nickel appliqués, while the pink gold version has an egg-shell white dial with gold polished appliqués. The timepiece comes with an alligator strap and is water resistant to 50 metres.